P014A - Sensor Delayed Response - Rich To Lean (Bank 2, Sensor 2) - DTC Chart
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P014A - SENSOR DELAYED RESPONSE - RICH TO LEAN (BANK 2, SENSOR 2) - DTC CHART
| Description:
During a deceleration fuel shut-off (DFSO) event, the PCM monitors the heated oxygen sensor bank 2, sensor 2 (HO2S22) signal to determine if the signal is stuck in range. The PCM expects the signal to exceed a calibrated rich or lean value within a calibrated amount of time. If the signal voltage remains less than the rich value after a number of occurrences, the PCM intrusively controls the fuel system rich over increasing time periods in an attempt to force the signal to greater than the calibrated rich value. This DTC sets when, after three consecutive intrusive attempts, the signal cannot be forced greater than the calibrated rich value. Also, if the signal voltage remains greater than the lean value after a calibrated amount of time with the fuel injectors off, a counter is incremented. This DTC sets when after three consecutive occurrences the signal is not less than the calibrated lean value. |
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Possible Causes:
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| Diagnostic Aids: Check for leaks in the exhaust system. Check for an intermittent HO2S22 signal. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to Pinpoint Test DW . | ||